option vs soft option

option and soft option both are nouns.

Word	Noun	Adjective	Verb	Adverb
option	Yes	No	No	No
soft option	Yes	No	No	No

As nouns, soft option is a hyponym of option; that is, soft option is a word with a more specific, narrower meaning than option:

option (noun)	soft option (noun)
the act of choosing or selecting	an easier alternative
one of a number of things from which only one can be chosen
the right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited